The inspection methods of LED indoor lighting fixtures mainly include the following aspects:

1. Appearance and structure inspection
Overall appearance: Check the outer shell, lampshade, and other parts of the lamp to ensure that there are no defects such as deformation, scratches, wear, paint loss, stains, etc. At the same time, check whether the logo and label of the lamp are clear and complete and whether the content meets the requirements.
Dimension inspection: Use measuring tools (such as calipers, tape measures, etc.) to measure the external dimensions of the lamp, including length, width, height, diameter, etc., to ensure that it meets the requirements of the design drawings or product specifications.
Structural inspection: Check whether the various components of the lamp are firmly connected, whether there is looseness, excessive gaps, etc. For example, whether the screws are tightened, whether the solder joints are firm, whether the lampshade and the lamp holder are tightly combined, etc.
2. Optical performance inspection
Luminous flux: Use an integrating sphere photometer to measure the total light output emitted by the lamp in lumens (lm). The test results should meet the nominal value of the lamp.
Illuminance: Use an illuminance meter to measure the illuminance value of the lamp on a certain plane at a specified distance and angle, that is, the luminous flux received per unit area. The unit of illuminance is lux (lx). According to the use scenario and requirements of the lamp, judge whether the illuminance meets the requirements.
Color temperature: Use a color temperature meter to measure the color temperature of the light emitted by the lamp. Color temperature is a unit of measurement that indicates the color components contained in the light, and the unit is Kelvin (K).
Color rendering index: Use a color rendering index tester to evaluate the ability of light to restore the color of an object. The higher the color rendering index, the stronger the ability of the lamp to restore the color of the object. Generally, the color rendering index of indoor lighting fixtures should be greater than 80.
Light intensity distribution: Use a distribution photometer to measure the light intensity distribution of the lamp at different angles and draw a light intensity distribution curve. This can reflect whether the light distribution of the lamp is uniform and whether it meets the design requirements.
3. Electrical performance detection
Input voltage and current: Use a voltmeter and an ammeter to measure the input voltage and current of the lamp to ensure that it works within the specified range.
Power factor: Use a power factor tester to test the power factor of the lamp. A higher power factor indicates a more efficient use of electricity.
Insulation resistance test: Use an insulation resistance tester to measure the insulation resistance of the lamp to ensure that its insulation performance is good to prevent safety problems such as leakage.
Withstand voltage test: Use a withstand voltage tester to apply a certain high voltage (such as 1500V, etc., the specific value depends on the standard) to the electrical part of the lamp for a period of time to check whether there are breakdowns, flashover, and other phenomena to verify the electrical insulation strength of the lamp.
IV. Temperature and heat dissipation performance detection
Working temperature: Use a thermocouple or infrared thermometer to measure the working temperature of the LED chip and the lamp housing to ensure that it operates within the allowable temperature range and ensures the life and performance of the lamp.
Heat dissipation performance: For lamps with high heat generation such as LED lamps, it is necessary to test their heat dissipation performance. After the lamp has been working normally for a period of time, use infrared thermometers and other equipment to measure the temperature of key parts of the lamp (such as LED chips, radiators, etc.) to check whether the temperature is within the allowable range.
5. Other tests
Stroboscopic test: A stroboscopic tester will be used to detect the stroboscopic condition of LED lamps. High-quality LED lamps should have no obvious stroboscopic phenomenon to ensure the comfort and safety of the lighting environment.
Life test: Although it is difficult to directly test the life of LED lamps, it can be indirectly evaluated by simulating actual working conditions (such as observing its light decay after continuous lighting for a certain period of time).
Vibration and shock test: Check the structural integrity and performance stability of lamps under vibration and shock environments.
Radiated disturbance and conducted disturbance test: Detect whether the electromagnetic radiation generated by the lamps during operation meets the relevant standards to avoid interference with other electronic equipment. At the same time, measure the electromagnetic interference conducted through the power cord.
Ground continuity test: Verify whether the grounding of the lamp is good to ensure that the current can be safely introduced into the earth in the event of an electrical fault.
Hazardous substance detection: For materials used in lamps (such as plastics, metals, electronic components, etc.), detect whether they contain harmful substances such as lead, mercury, cadmium, hexavalent chromium, etc. If the content of harmful substances exceeds the specified limit, it may cause harm to human health and the environment.
VI. Record and Analysis of Test Data
Record test data: record the various data obtained during the test process (such as appearance inspection results, performance parameters, reliability test data, etc.) in detail to ensure the accuracy and traceability of the data.
Analyze test results: analyze and evaluate the quality of the lamps according to the recorded test data and the relevant standards and requirements. Determine whether the lamps are qualified. If there are unqualified items, analyze the reasons and propose corresponding improvement measures. The test report should be signed by the test personnel and stamped with the official seal of the testing agency.
In summary, the test methods of LED indoor lighting fixtures involve multiple aspects, including appearance and structure, optical performance, electrical performance, temperature and heat dissipation performance, and other special performance tests. The comprehensive use of these test methods can comprehensively evaluate the quality and performance of lamps to ensure that they meet relevant standards and requirements.